The crescent forms of the erythrocyte in normal and pathologic blood expressions : origin of red blood corpuscle and blood plasm / by Frank A. Stahl.

  • Stahl, Frank August, 1862-
Date:
[1887?]
Catalogue details

Licence: Public Domain Mark

Credit: The crescent forms of the erythrocyte in normal and pathologic blood expressions : origin of red blood corpuscle and blood plasm / by Frank A. Stahl. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    STAHL: TIIL C'RESCHXT FOKAIS OF TIIF KHVTI lH(K'Y'ri:. l)l()()(l-mu‘loiis-cof])iisFlo may be Iraeed from the syneyliiim into I lie stroma, blood space and vessel of the villus; tbroii^h the course of the vilus to empty into the blood s])a('e and vc'ssel of the chorion. Likewise throng'h the trophoblast and syncytium of the chorion and villus, is the orio'in of the primal blood plasm. In another .series of slides from a d-4th Aveek series, the blood nuclei-i'orpuscles from the inner roAv of the syncytiuin, and which form the primal uncolored mnltinncleated nuclens-blood- corjniscles, characteristic of and giving' color to the ])rinial nn- colored blood circulation, can readily be traced ; (1) the nncleus- cell leaving the '2nd row of the syncytium ; (2) to enter a ]irimal lilood space-ve.ssel of the villus; (3) such a blood siiace-ves.sel can be traced throughout the length of the villus; (4) to enpity and [lass through the chorion into a blood-island in the area vascn- losa, just within the inner free margin of the chorion; (b) from this blood island anastomosing blood circnlation divisions radiate to the right and left, in the area vascnlosa in the cavity of the chorion; (ti) blood nucleu.s-cor])uscle ditferentiation is clearly shown from the large round mnltinncleated nucleus of the 2nd row to its s])indle shaped elongated form, where the metamor- phosing nucleoli of the original nucleus of the syncytium cling together in an elongated s]iindle form, just ready to break np and divide into .several offspring; one offspring for each nucleolus. This multiplication and division of primal nuclens-blood-cor- [inscle diffei'entiation, may easily be traced into and through the villus, (diorion and area vascnlosa, and distinctly so, as mentioned, in the slides of the 3-4th Aveek series. This offs])ring differentiat('s into the mono-nucleated red erythroblast, in blood s])ace and vessel of the adolescing blood .stream; Avhere primary hematinization occurs, thus the primal uncolored blood circulation gives Avay to the 2nd or initial red colored blood circnlation of erythi'oblast. In 1922, page 41, Physiological lievieAvs, Dr. Florence Sabin Avrites, in “Origin of the Cells of the Blood,” that, “MaximoAv, 1909-1910, finds that the first blood cells of mammals dcA^lop Avithin the A'es.sels of the embryonic membrane, as do those of the chick; that the primary cells are first lymphocytes then erythro- blasts. ’ ’ Again, ])age 53; “M. thinks origin of red cells from the endo-